Improvement in cow-milkers



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a'escnenuie referred ca inches@ Letters Patent and making part or :he sama.

To all whom it may concern,"

Be it knhownthat I, LEIGHTON O. GoLvrN, of Humphreyv1lle,m the county of Luzerne and State nf Pennsylvania, have invented a. new and useful lmprovement in 'Cow-Milkers, of which the-following is a full, clear, and exact description, reference being had to the accompanying drawing forming' part of this specification, andin which- Figure 1 represents a sectional elevation ot' a cowmilker kconstructed in accordance with my im provemcnt, said section `being taken as indicated by the line :c z in Figure 2, which is a sectional plan of said milker;

, Figure 3 is a vertical section at right angles to fi". 1 of the pan and working portions of the milker, with tent-cups removed; and' n i Figure` 4,a vertical section of. `one of the teat-cnps as combined with the pan, which latter is shown only in part.

` Similar letters of reference -indicate corresponding parts. t

This invention is mainly designed to be applied to cow-nlilkers of a portable character, intended to be operated by hand on one cow at a time, and has certain featuresin common with the cow-milkcrs dc- 'seribed in Letters Patent issued to me February 17, 1863, and April 5, 1870, such as, for instance, a piston with flexible margin attached to theupper edge of the pan, and serving to work a series of tent-cups; likewisea certain arrangement of the handles of the apparatus, whereby they are made to servo the two-i 1fold purposcof operating and carrying vit in such manner that, iu the working yof said handles, swing or twist on the teats is avoided, and so that a straight 'up-aud-down motion ispommunicated to the apparatus corresponding to the naturalv sucking action or motion`of the-calf, It. also includes, as previnsly used, aseparate valve 'or'cock 'to each tent-cup, for establishing or shutting oli' communication of any one or more of the cups with the pan below the piston, to'

facilitate the separate attachment of the tents to the apparatus and for other-purposes.

This invention, however, essentially differs from previous machines in several important particulars. Thus, it dispenses with the use oiiin'ater for working the teat- Acups, and secures relief to the tcats by establishing tiow of the milk up and down and within" the teatcups, without risk of the milk being expelled over the tops of the latter.

` The invention also embraces acertain combination of handles arranged to operate as hereinbefore described, and cranks and rods operated by said handles,

with a flexible diaphragm or piston, steadied in its travel by a lower stem or guiderod, whcreby a smooth, steady, and perfect action of the apparatus is secured and wear of parts reduced.

'lhe invention likewise includes an elevated arrange` ment of thedischarge-valve relatively to the base of the pan, whereby the machine is always kept charged and said valve covered with milk, such valve preferir bly being of a llexible-ilap construction and made to rest on or close against a perforated sheet-metal plate.

The invention furthermore embraces certain pecnliarities of construction to stiften the apparatus and facilitate the renoval of parts; also, includes an airpassage up the side oflhe tent-cups, to prevent the tents being drawn down or wedged in said cups.

Referring to the accompanying drawing- A represeutsthe pan of the apparatus, which pan may be made of sheet metal, and operates as a pump cylinder, a being the base thereof,

B is the elastic diaphragm or piston, formed of plates'"b b, holding between them a rubber or other vsuitable flexible strip, c, which is secured on its outer edge to thetep of the pan by a clamping-ring, 0, provided with ears d that are made to lock under lugs c, arranged to project from brackets I) run up the sides of the pau.- These brackets D serve materially to stiffeu the pan, andihalve the suction-passages f to the tent-cups F up through them, said passages being of a small-sized area, and communicat-iugwith the pumping-chamber of thepan at or near its base fr.

Sain brackets l) also serve to carry the cocks g, which are used to shut oil communication with the tent-cups when required, said tent-cups being secured by clamps and screws h to the tops of the brackets,

that have screws 'i fitted through their lugs e, for

tightening down the clampingering C on the flexible portionl c of the pist-on. Thus the brackets D have a multiplicity of functions or uses'.

E Eare the inversely-,cranked handles, by which the machine is carried aud-operated as hereinbefore referred to, but instead of using toothed sectors and racks for communicating motion from said handles t9 the piston, as in my )ptteut of April 5, 1870, I attach levers to 01' crank'tlI xhafts of said handles, as at It' 1.', and connect such lever portions, by rods ll, with the top plate of the moving diaphragm or piston, the shafts of the handles working in bearings 'm "m, on the ring O. This constitutes 'a simple, efficient, and durablc means for working the piston, and, by the clamping-ring C heilig secured in a readily-detachable manner by its ears d, 'arranged to pass under the lugs c, the whole working mechanism, together with the piston, -can be removed from the, pan, when" necessary to clean the latter, or for otherreasons, 'by simply turning the ring G to pass from under lock of the lugs e.

Seemed to the bottom of the diaphragm or piston is a stem, n, made to work in a tubular guide, o, arranged to project below the base-plate a of the pau, and closed at its lower end. This constitutes a steadying device to the working mechanism, and serves to prevent shake and wear-'of the diaphragm, also to give steadiness generally to the apparatus.

G is au outlet-passage or chamber arranged to 'pro- 'ject from the one side of the lower portion of' the pan or working-chamber thereof. This passage G is covered by a perforatedplate, a', of snieient area as re` gards itsperfoiationsto allow of -free egress through it'for the milk from the panupon a flap-valve, H,

which-covers said plate, being raised; rlhe dischargevalve H Ais thus made to occupy an elevated position relatively to the base of,;,the pan, which insures the' machine always being charged with "milk, and by means of a dam, s, atthe onter'end ofthe valve', the latter is kept covered with milk passing to the spout 1, which insu res the tightness -of said valvesl .lhe perfoi fted plate lr serves to support the valveV H. This varre may be made of any soft material, and- -is restrained .rom unduly lisingiby a tongue, t.

In the operation of the'machine the suction to draw l the'milk fron the teats is produced bythe ascent of the pistou or diaphragm,and each descent of the'lntfY .ter forces back a portion of milk upthe contracted passages f, but not wthsufiicient force' to expel it :over the tops'of the teat-cu s, and it is only toward meer The teatlcups F have an air-passage, il, in their sides extending from their upper to their lower portions, and opening at its two extremities wit-hin the cups. This, by establishing equalization of the vacuum above and below, prevents the teats from beingdrawn vdown or wedged within the cups.

1. The reversely-craukedhandles E E, cranks or levers k lr, and rods l I, all constructed and arranged' for operation substantially as described, in combination with the flexible diaphragm B, provided with a lower guiding-stema, essentially as set forth.

2. '.lhe arrangement, essentially as herein 'set forth, Aof the discharge-valve H, relatively to the base of the pan and contracted suction-passages f leading to the cadtcups, substantially as and for the purpose speei- -3. The ontletfchamber G, provided with aperferated discharge-plate, Ir, and4 dam s, in combinationn with the valve H, the whole being arranged in relation to the pan,`as specified. j

. 4. The clamping-ring O, provided with locking-ears d, for action under -xed lugs e, in combination with th reversely-cranked,handles E E and ilexible diaphragm or piston B, substantially as described.

,5. The air-passage u within the sides of the teat` l Witnesses:

Fnnn.' Haynes, R. E, EABEAU.

What is here claimed, 'and desired to be secured by i cups, arranged to communicate at its opposite ends 

